Improvement in watches



C. LEHMANN.

` Watch.

f i ,.0561633.- f ,Y Patented July 24, 1866.-

@fw @www l* UNITED STATES PATENT OFFICEo CHARLES LEHMANN, OF PARIS, FRANCE.

IMPROVEMENT IN WATCH ES.

Specification forming part of Letters Patent No. 56,683, dated July 24, 1866.

Y To all 'whom 'it may comer-'11.:`

Be it knownv that I, CHAnLEs' LEHMANN, v.of Paris, France, have vinvented certain new and useful Improvements'in Watches with I' Keys, of whiehlthe following is a specitication.

My invention has reference to the combination of y a key or winding device with a -penvdant which presents as its pecnliarity lthe employment of a single inflexible rod to operate the mechanism of the minute-wheels and that which winds np the barrel.

For moving the hands there is no accessory stem on the back it is only necessary to draw that 4isto say, the v hands may be moved in .either direction without interfering at all with the other mechanism.

- Upon pushing in the rod or` stem to its normal position the watch may then bewound. The mechanism `by which this result is accomplished is arranged' in a manner analogous to.

that of a Breguet key, The hands remain in the meantime in a state of repose.

' The arrangement of the mechanism of which 4Il desire to secure the exclusiveownership may be'readly understood by examining the draw ings annexed to the present application.

Figurel represents a face view of the mechjanism of the key drawn to a scale of double I size, the rod or stem of the key being placed in the position'which it must naturally occupy for wi-nding up the mainspring. Fig. 2 is a transverse section made through the line l 2. Fig.

3 shows a face view, corresponding with Fig.

1, but in which the rod or stem is placed in vthe proper position to set the watch to the hourthat is to say, to move the hands only.

Y Theinain stemof the key ttseen separately in Figfl) is surmounted with a milled button,

b, or crown, and carries a hub having two grooves,g and g', so that a toothed socket, c,

. which forms a clutch by engaging with a corresponding part, c', which appertains to the driving helix, by means of the endless screw h gives motion directly to the shaft of the barrel by the intervention of the helical-toothed wheel d. The helix h and the toothed part c' are fixed-that is to say, they have no transfer movement, but are held in position by the branch e of the bridge E. The spring 1', of which one end is rigidly attached to the plate, terminates at the other end in a fork to embrace the groove made in the sleeve c, which may be displaced byA means of the stem t. The spring r', which rises parallel to the stem of the key` terminates in a V-shaped projection or catch, x, which enters one or the other of the grooves g and g', according as the stem or rod is placed in position to wind up the spring or to move the hands.

The end of the rod or stem t, whichA extends through the helix or screw 71., carries asmall pinion, f, the teeth of which engage with those of the wheel t', which transmits the rotary motion it receives to the other wheels, j, lc, l, and m, which connect with the mechanism of the wheels to which the hands are attached.

When the rod t is in its normal position the sleeve c, iixed upon this rod, is always means of the pressure constantly exercised by the spring r, as indicated in Fig. 3. By turning the milled button b in the direction of the arrow motion is given to the helix h, which controls the helical-toothed wheel fixed on the shaft of the barrel, thereby winding up the watch. When it is turned backward part c', which produces the eiect of the key Breguet. At the same time, the small pinion f being completely disengaged, the minutewheels cannot suffer any deran gement. Wh en on the contrary, therod is drawn in such a .manner that the stop a: of' the spring r enters the Igroove g', Fig. l, the pinion f engages with the wheel 'i and the sleeve c, suiiiciently removed .from the part e that the latter cannot receive any movement either to the right or to the left. By turning the button b in 'one direction or the other the watch may be set t0 the hour with facility, when the stem t vmay he pushed into its former position to disgage the hands.

Various arrangements of keys having been engaged with the part c of the helix h by Y the sleeve c falls back to escape the teeth of the .ready propqsedg Ld esile tb at is sh nu he en the wffole f the' mechanism, qnon* do :n.i" vthe single operating rod'orstem, broadly,

l as described, and capable of being connected xderstoodfthsnt' I do not claim as'nly prop medately. orimmedatelypth the Wheel which I controls the munsprngaind with the mnutef wheel of the \va.t;eh,fsnbsmntally as herein j Winding' and setting the hendsqf n, wtch; set fort-h. n1f v OHAS. LEHMANN. 'QWhat I claim as my invention is- Witnesses:

"The arrangement ofAtheclncch o c', in Vcom- A. ROBIC,

A. Gom, J r.

.qnaionevwlth the rodvfol stem t, constructed 

